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dc.contributor.authorRalphs, M. H.
dc.contributor.authorJones, W. A.
dc.contributor.authorPfister, J. A.
dc.date.accessioned2020-09-23T05:53:11Z
dc.date.available2020-09-23T05:53:11Z
dc.date.issued1997-07-01
dc.identifier.citationRalphs, M. H., Jones, W. A., & Pfister, J. A. (1997). Damage from the larkspur mirid deters cattle grazing of larkspur. Journal of Range Management, 50(4), 371-373.
dc.identifier.issn0022-409X
dc.identifier.doi10.2307/4003302
dc.identifier.urihttp://hdl.handle.net/10150/644074
dc.description.abstractThe larkspur mirid (Hopplomachus affiguratus) is host specific to tall larkspur (Delphinium barbeyi Huth). These insects suck cell solubles from leaves and reproductive racemes, causing flowers to abort and leaves to desiccate. Cattle generally prefer lark spur flowering heads, pods, and leaves, and are frequently poisoned. The objective of this experiment was to determine if cattle would avoid eating mirid-damaged larkspur. A 2-choice cafeteria feeding trial was conducted to determine preference for mirid-damaged and undamaged larkspur. Four cows were offered a choice of the 2 types of larkspur in 10 min. feeding trials in the morning and evening for 5 days. Cows preferred the undamaged larkspur plants (0.8 kg +/- 0.08, SE) over mirid-damaged plants (0.1 kg +/- 0.03, SE). The cows were then turned out into a larkspur-infested pasture and consumption of mirid-damaged and undamaged larkspur was quantified by bite count. The cows did not select any mirid-damaged larkspur. Consumption of undamaged larkspur peaked at 17% of bites on the second day of the grazing trial, then declined as mirid damage on the plants increased. If the density of mirids on larkspur is sufficiently high to damage most of the leaves and flowering racemes, grazing by cattle may be deterred, and subsequent poisoning avoided.
dc.language.isoen
dc.publisherSociety for Range Management
dc.relation.urlhttps://rangelands.org/
dc.rightsCopyright © Society for Range Management.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjecthopplomachus affiguratus
dc.subjectprevention
dc.subjectdamage
dc.subjectbiological control agents
dc.subjectleaves
dc.subjectpoisoning
dc.subjectflowers
dc.subjectDelphinium barbeyi
dc.subjectcattle
dc.subjectUtah
dc.subjectgrazing
dc.subjectfeeding preferences
dc.subjectpoisonous plants
dc.titleDamage from the larkspur mirid deters cattle grazing of larkspur
dc.typetext
dc.typeArticle
dc.identifier.journalJournal of Range Management
dc.description.collectioninformationThe Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform August 2020
dc.source.volume50
dc.source.issue4
dc.source.beginpage371-373
refterms.dateFOA2020-09-23T05:53:12Z


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